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Commit dda9012b authored by Shirish S's avatar Shirish S Committed by Inki Dae
Browse files

drm/exynos: add check for the device power status 



V2: Add mutex protection, while read.

The hdmi and mixer win_commit calls currently are
not checking the status of IP before updating the
respective registers, this patch adds this check.

Signed-off-by: default avatarShirish S <s.shirish@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent 428982e7

drivers/gpu/drm/exynos/exynos_hdmi.c

+7 −0
Original line number Diff line number Diff line
@@ -2163,6 +2163,13 @@ static void hdmi_commit(void *ctx) 


	DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);



	mutex_lock(&hdata->hdmi_mutex);

	if (!hdata->powered) {

		mutex_unlock(&hdata->hdmi_mutex);

		return;

	}

	mutex_unlock(&hdata->hdmi_mutex);



	hdmi_conf_apply(hdata);

}

drivers/gpu/drm/exynos/exynos_mixer.c

+7 −0
Original line number Diff line number Diff line
@@ -776,6 +776,13 @@ static void mixer_win_commit(void *ctx, int win) 


	DRM_DEBUG_KMS("[%d] %s, win: %d\n", __LINE__, __func__, win);



	mutex_lock(&mixer_ctx->mixer_mutex);

	if (!mixer_ctx->powered) {

		mutex_unlock(&mixer_ctx->mixer_mutex);

		return;

	}

	mutex_unlock(&mixer_ctx->mixer_mutex);



	if (win > 1 && mixer_ctx->vp_enabled)

		vp_video_buffer(mixer_ctx, win);

	else